Getting no such element found exception in seleniumc

Question

I want to get the control for passing the ticket number in the search bar and update the work notes field and need to change the state field to resolved and click on the update button in servicenow. I have tried but it shows (no such element found exception). kindly help me in this case. I have attached the sample code that I have tried.I have used seleniumc#.

IWebElement elem = driver.FindElement(By.Id("sysparm_search")); 
((IJavaScriptExecutor)driver).ExecuteScript("arguments[0].scrollIntoView();", elem); 
elem.SendKeys("INC0008111");
elem.SendKeys(Keys.Enter); 
WebDriverWait wait2 = new WebDriverWait(driver,TimeSpan.FromSeconds(20)); 
wait.Until(ExpectedConditions.ElementExists(By.Id("activity-stream-textarea"))) 
wait2.SendKeys("closing the request"); 
SelectElement se = new 
SelectElement(driver.FindElement(By.Name("incident.state"))); 
se.SelectByIndex(3); IWebElement ele4 = 
driver.FindElement(By.Id("resolve_incident")); ele4.Click();